Canon TR7660 Online Manual page 476

If the pattern is not printed correctly, check if the ink tank for the problem color is empty.
If the ink tank is not empty, go to the next step.
Clean the print head.
Step2
After cleaning the print head, print the nozzle check pattern and check the result.
• For Windows:
Clean the print head
• For macOS:
Clean the print head
If it does not improve, go to the next step.
Clean the print head again.
Step3
After cleaning the print head again, print the nozzle check pattern and check the result.
If it still does not improve, go to the next step.
Clean the print head deeply.
Step4
After cleaning the print head deeply, print the nozzle check pattern and check the result.
• For Windows:
Clean the print head deeply
• For macOS:
Clean the print head deeply
If it does not improve, turn off the printer for more than 24 hours without disconnecting the power plug, and go to the next step.
Clean the print head deeply again.
Step5
After cleaning the print head deeply again, print the nozzle check pattern and check the result.
If it still does not improve, go to the next step.
Request a repair.
Step6
If problem is not resolved after performing print head deep cleaning twice, the print head may be damaged. Contact your nearest Canon
service center to request a repair.
For details on printing the nozzle check pattern, print head cleaning, and print head deep cleaning, see
Is Faint or Uneven.
When using paper with one printable surface, check the correct printable side
Check5
of the paper.
Printing on the wrong side of such paper may cause unclear prints or prints with reduced quality.
When you load paper on the rear tray, load paper with the printable side facing up. When you load paper in the
cassette, load paper with the printable side facing down.
Refer to the instruction manual supplied with the paper for detailed information on the printable side.
• When copying, see also the sections below:
Is platen glass or glass of ADF dirty?
Check6
Clean the platen glass or the glass of ADF.
Cleaning Platen and Document Cover
Cleaning the ADF (Auto Document Feeder)
476
If Printing